They all sound good - one would only be better than the other depending upon your needs, and what you are looking to accomplish. That said, I like the last the least - it's a bit too mono for my tastes, but that's really more of an opinion thing than anything else. Also, it really does not sound like it is sitting in the back of a hall.
Thanks Jeffrey. I prefer the first two to the last. I posted the last as a point of contrast. I am quite surprised by the lack of reflection in it. The stereo is lost in the last one too. Perhaps I should try for somewhere in between.
Dan. Thanks for listening. It sounds more mono to me than a few feet away. I think the first piece seems like the players are a few feet away and the left right separation of the players becomes an issue. As much as I like the first one, I think its too spread out. I don't think I used any tremolo samples in this. I did use performance repetitions (crescendo and decrescendo repetition effects).
Im not sure what you mean by 'arrogant'. Regardless, MIR can host a lot of VSTs. I've used Battery 3, Kontackt player 3 + 4, a Gamelan vst and Evolve Mutations.
Altiverb is not 64 bit and I've changed my platform. I hate to say it, but my Altiverb is collecting dust.
I quote DAN's comments: it sounds pretty electronic; if it's your aim, it's ok (sounds musically very nice anyway) but if your aim is realistic string solos performance, we are quite far from the target here (usual Vienna editing issue...).